DiffraxSimulatorhave a new parameteradto specify forward or reverse mode ADdistance_to_earthgradient now evaluates to0(and notnan) when the distance between two points is0(same location)- Some minor fixes
DiffraxSimulator have a new parameter ad to specify forward or reverse mode ADdistance_to_earth gradient now evaluates to 0 (and not nan) when the distance between two points is 0 (same location)